Name: Pterocarya stenoptera

chinese ash

English name China Wingnut

Alias ladle willow, willow, water willow, chicken fir tree, maple willow, centipede willow, willow, swallow tree and Acer truncatum.

It belongs to Juglandaceae and Pterocarya.

Morphological deciduous tree, up to 30 meters high, dry skin grayish brown, smooth when young, longitudinally split when old. Stipules bare buds, densely covered with rust hairs. Branchlets are gray with obvious lenticels and septa. Odd-pinnate compound leaves, but the terminal leaves are often not even-numbered, the leaf axis is winged and hairy, the leaflets are 5-8 pairs, sessile, 8- 12 cm long and 2-3 cm wide, with fine teeth on the edge, and the abaxial surface of the leaves is hairy along the veins and axils. Monoecious flowers, the male flowers are inflorescence-shaped and the female flowers are spike-shaped. Nutlets have wings at both ends, bloom in May and mature in September.

The origin distribution is China native tree species. It has been cultivated and utilized for hundreds of years, and now it is widely distributed in North China and South China, especially on the banks of rivers and streams.

Ecological habits: light-loving tree species, not tolerant to shade, but water-resistant, moisture-resistant, cold-resistant and drought-resistant. The roots are deep, the main roots and lateral roots are developed, and the deep and fertile riverbed grows well on both sides. Fast growth, strong tillering ability and strong resistance to sulfur dioxide and chlorine. The leaves are poisonous and are not suitable for planting near fish ponds.

Garden use: The tree has a broad crown, dense branches and leaves, rapid growth and developed roots. It is a good greening tree species for low-lying wetlands on both sides of the river bed. It can be used as street trees, planted in patches or planted alone on lawns and slopes, and can form a certain landscape.

Breeding is mainly based on sowing. The germination rate is high in autumn, and the seedlings are easy to branch. Therefore, they should be pruned in time to keep a good dry shape and should be planted in spring. Overwintering branches are vulnerable to freezing injury and the survival rate is low.

Other uses are easy to process, non-corrosive, easy to warp, good adhesion, good coloring and good painting. Wood is white and soft, and can be used as furniture and matchsticks. It can also be used as walnut rootstock. The leaves are poisonous and can be used as medicine to kill insects. They contain salicylic acid, lactone and phenols. Seeds contain fatty oil.

Homologous and similar species:

Begonia hupehensis This species is different from Pterocarya stenoptera. The compound leaves are obviously odd-pinnate, with 5- 1 1 leaflets, wingless leaf axis and semicircular nutlet wings spreading to both sides. Location: Funiu Mountain in Henan, Dabie Mountain in Anhui and Tongbai Mountain in Anhui. It is also distributed in Central China, Northwest China and Southwest China.